944 
We now consider the correspondence (MD, MS). Its characteristic 
numbers are 3(n—1).2(n—38) and 3(n—1)(2n’—n—8), while each 
of the tangents ¢ converging in J/, apparently produces 1— 8) coinci- 
dences. The remaining ones arise from coincidences D = S, conse- 
quently from nodal curves, for which D has an inflection on one 
of its branches. It now ensues from 6(n—J)(n—3)+3(n—1)(2n’—n —8) 
—3 (n—1) (n—-3) (2n—3) = 3(n—1) (10n—23), that the net contains 
3(n—1)(10n—23) curves with a fleenodal point. 
ERR AcE DM 
In the Proceedings of the meeting of November 28, 1914. 
p. 870 line 15 from the bottom: Add: Supplement N°. 37 to the 
Communications from the Physical Laboratory at Leiden. 
Communicated by Prof. H. KAMERLINGH ONNES. 
January 28, 1915. 
